package jdbc;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;

/**
 * 设置事务的隔离级别
 */
public class JDBCDemo12 {
    public static void main(String[] args) {
        try (Connection connection = DBUtil.getConnection();){
            //Connection提供了设置事务隔离级别的方法
            //connection.setTransactionIsolation(Connection.TRANSACTION_READ_COMMITTED);
            connection.setTransactionIsolation(Connection.TRANSACTION_READ_UNCOMMITTED);
//            connection.setTransactionIsolation(Connection.TRANSACTION_REPEATABLE_READ);
//            connection.setTransactionIsolation(Connection.TRANSACTION_SERIALIZABLE);
            connection.setAutoCommit(false);
            String sql = "INSERT INTO userinfo (username,password,nickname,age VALUES(?,?,?,?))";
            PreparedStatement ps = connection.prepareStatement(sql);
            ps.setString(1,"admin");
            ps.setString(2,"123456");
            ps.setString(3,"管理员");
            ps.setInt(4,18);
            int num = ps.executeUpdate();
            System.out.println(num>0?"添加成功":"添加失败");
            connection.commit();
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}
